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首页> 外文期刊>Catena: An Interdisciplinary Journal of Soil Science Hydrology-Geomorphology Focusing on Geoecology and Landscape Evolution >Investigations on the parent material of soils of two Nile Valleys with different river dynamics (White Nile and Blue Nile)
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Investigations on the parent material of soils of two Nile Valleys with different river dynamics (White Nile and Blue Nile)

机译：不同河流与不同河流动力学（白色尼罗河蓝尼罗河）母材的母材调查

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摘要

Soils of two Nile Valleys (White Nile and Blue Nile) and the neighboring Nubian Sandstone plateaus (Qoz) in Central Sudan were investigated. The White and Blue Niles rise from different areas and are different in their water flow velocity, flood amplitude and flooding time. The results of this study show that sediments of both valleys consist of an allochthonous and a parautochthonous component. The allochthonous part of the White Nile and Blue Nile show different texture and mineralogical composition. It consists of smectite-rich clayey material in the White Nile whereas the Blue Nile sediment contains carbonates, is rich on smectite and is silty-clay. The parauthochthone part in both Nile Valleys is sandy and rich on kaolinite. Its origin is predominantly eolian and fluvio-eolian from Nubian Sandstone. Its amount in the first terraces (youngest terraces) is highest and lowest in the second Terraces. This point out, that the youngest terraces as well as the third terrace on the Blue Nile were developed in a time when the surrounding area was covered with a loose vegetation cover (ergo dry climate) and the second terraces were developed in a period with a dense vegetation cover (ergo wet climate).
机译：调查了两个尼罗河（白尼罗河和蓝尼罗河）的土壤和苏丹中部邻近的Nubian Sandstone Plateaus（Qoz）。白色和蓝色尼尔斯从不同的区域升起，在水流速，洪水幅度和洪水时间上不同。该研究的结果表明，两只山谷的沉积物由表发情和副宿性组分组成。白色尼罗河和蓝尼罗河的外形部分显示出不同的质地和矿物学组成。它由白尼罗河中的富含晶体的粘土材料组成，而蓝尼罗泥沙含有碳酸盐，富含蒙脱石，是硅淤泥，是粉状粘土。尼罗河谷的Parauthochthone部分是桑迪和富有的高潮。它的起源主要来自Nubian Sandstone的Eolian和Fluvio-Eolian。它在第一个露台（最小梯田）中的金额最高，第二次露台最低。这一点是，最年轻的露台以及蓝色尼罗河上的第三个露台在周围地区被宽松的植被覆盖（ergo干燥的气候）覆盖（Ergo Dry Climate），第二个露台在一个时期开发密集植被覆盖（逆湿气候）。

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